CVE-2026-0390: CWE-807: Reliance on Untrusted Inputs in a Security Decision in Microsoft Windows 10 Version 1607
Reliance on untrusted inputs in a security decision in Windows Boot Loader allows an authorized attacker to bypass a security feature locally.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-0390) involves the Windows Boot Loader in Windows 10 Version 1607 relying on untrusted inputs when making a security decision. This flaw allows an attacker with authorized local access and high privileges to bypass a security feature, potentially impacting system confidentiality, integrity, and availability. The vulnerability has been assigned a CVSS 3.1 score of 6.7, indicating a medium severity level. Microsoft has released an official fix to address this issue.
Potential Impact
An authorized attacker with high privileges on the affected Windows 10 Version 1607 system can bypass a security feature in the Windows Boot Loader. This could lead to unauthorized access or modification of system components, affecting confidentiality, integrity, and availability of the system. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-0390 to remediate this vulnerability.
CVE-2026-0390: CWE-807: Reliance on Untrusted Inputs in a Security Decision in Microsoft Windows 10 Version 1607
Description
Reliance on untrusted inputs in a security decision in Windows Boot Loader allows an authorized attacker to bypass a security feature locally.
CVSS v3.1
Score 6.7medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-0390) involves the Windows Boot Loader in Windows 10 Version 1607 relying on untrusted inputs when making a security decision. This flaw allows an attacker with authorized local access and high privileges to bypass a security feature, potentially impacting system confidentiality, integrity, and availability. The vulnerability has been assigned a CVSS 3.1 score of 6.7, indicating a medium severity level. Microsoft has released an official fix to address this issue.
Potential Impact
An authorized attacker with high privileges on the affected Windows 10 Version 1607 system can bypass a security feature in the Windows Boot Loader. This could lead to unauthorized access or modification of system components, affecting confidentiality, integrity, and availability of the system. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-0390 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2025-11-19T11:49:07.943Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-0390","vendor":"Microsoft"}]
Threat ID: 69de7a1482d89c981fd6a5dd
Added to database: 04/14/2026, 17:32:04 UTC
Last enriched: 06/19/2026, 16:56:35 UTC
Last updated: 07/31/2026, 19:22:57 UTC
Views: 144
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